Douglas X-3 Stiletto (signed)The twin turbojet X 3, the only one built, was designed to test features of an aircraft suitable for sustained flights at supersonic speeds and high altitudes. A secondary mission was to investigate the use of new materials such as titanium and to explore new construction techniques. The X 3 made its first test flight at Edwards AFB, California on October 20, 1952 and flew supersonically in June 1953. Unlike the X 1, X 2, and X 15 which were released

a designer from de Havilland in England who had worked on the Vampire and 108 Flying Wing project (Frost was also the key player in the Avrocar project) Initial armament requirements were for four 20mm Aden cannons but that was replaced by eight

The USAF Thunderbirds used T-38As from 1974 to 1982 because of their economic operation and high performance

it was not well-conceived in terms of payload

with various models proving crucial

the 150kW (200hp) powered 112 was widely regarded as underpowered

the Army received nearly 8

survivable and highly lethal weapon system that meets the military services' performance requirements while achieving strict affordability targets

The superior design was so successful that German high command ordered it copied

DHC-2 Beaver airplane model

Production difficulties

and collaborate with civilian officials

On April 8